Air quality has improved throughout the Swiss city of Fribourg in recent years. Only the ozone and ammonia values are still regularly too high, according to an initial assessment by the Fribourg Environment Service (SEn). +Get the most important news from Switzerland in your inbox Efforts must be maintained in Switzerland and abroad to ensure a reduction in concentrations of these two components, says the SEn in a press release. The SEn is drawing up an initial assessment five years after the entry into force of a plan of measures to protect the air. In the area of combustion, the results are mixed. Unlike central wood-burning systems, individual space heating systems (stoves, fireplaces) are not subject to periodic checks to limit harmful emissions, even though they are a major source of fine particles. Checks carried out on site diesel engines show that, on the whole, the fleet of machines complies with current technical standards. At the same time, in 2024 the SEn began the ...
